The following table shows the standardized math exam scores for a random sample of students for three states. The sample included an equal number of eighth-graders and fourth-graders.       Tennessee Florida Arizona Eighth Grade 260 292 286   255 260 274   247 287 290   277 280 269   253 275 284   260 260 297 Fourth Grade 275 270 286   248 283 290   250 280 295   221 270 278   236 283 258   240 290 2

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